// Copyright (c) 2019-2026 ReactiveUI and Contributors. All rights reserved.

// ReactiveUI and Contributors licenses this file to you under the MIT license.

// See the LICENSE file in the project root for full license information.

namespace Refit;

/// <summary>Represents a method composed of its name, generic arguments and parameters.</summary>

internal readonly struct MethodTableKey : IEquatable<MethodTableKey>

{

/// <summary>Initializes a new instance of the <see cref="MethodTableKey"/> struct.</summary>

/// <param name="methodName">Represents the methods name.</param>

/// <param name="parameters">Array containing the methods parameters.</param>

/// <param name="genericArguments">Array containing the methods generic arguments.</param>

internal MethodTableKey(string methodName, Type[] parameters, Type[] genericArguments)

{

MethodName = methodName;

Parameters = parameters;

GenericArguments = genericArguments;

}

/// <summary>Gets the methods name.</summary>

internal string MethodName { get; }

/// <summary>Gets the Array containing the methods parameters.</summary>

internal Type[] Parameters { get; }

/// <summary>Gets the Array containing the methods generic arguments.</summary>

internal Type[] GenericArguments { get; }

/// <inheritdoc/>

public override int GetHashCode()

{

HashCode hashCode = default;

hashCode.Add(MethodName);

for (var i = 0; i < Parameters.Length; i++)

{

hashCode.Add(Parameters[i]);

}

for (var i = 0; i < GenericArguments.Length; i++)

{

hashCode.Add(GenericArguments[i]);

}

return hashCode.ToHashCode();

}

/// <inheritdoc/>

public bool Equals(MethodTableKey other)

{

if (Parameters.Length != other.Parameters.Length

|| GenericArguments.Length != other.GenericArguments.Length

|| MethodName != other.MethodName)

{

return false;

}

for (var i = 0; i < Parameters.Length; i++)

{

if (Parameters[i] != other.Parameters[i])

{

return false;

}

}

for (var i = 0; i < GenericArguments.Length; i++)

{

if (GenericArguments[i] != other.GenericArguments[i])

{

return false;

}

}

return true;

}

/// <inheritdoc/>

public override bool Equals(object? obj) => obj is MethodTableKey other && Equals(other);

}